Produces an activity or a tempo plot.
Arguments
- object, x
A EventDate object.
- ...
Currently not used.
- type
A
character
string indicating the type of plot. It must be one of "activity
" (default) or "tempo
". Any unambiguous substring can be given.- event
A
logical
scalar: should the distribution of the event date be displayed? Only used if type is "activity
".- select
A
numeric
orcharacter
vector giving the selection of the assemblage that are drawn.- n
A length-one non-negative
numeric
vector giving the desired length of the vector of quantiles for density computation.
Event and Acccumulation Dates
plot()
displays the probability estimate density curves of archaeological
assemblage dates (event and accumulation dates; Bellanger and Husi
2012). The event date is plotted as a line, while the accumulation date
is shown as a grey filled area.
The accumulation date can be displayed as a tempo plot (Dye 2016) or an activity plot (Philippe and Vibet 2017):
- Tempo plot
A tempo plot estimates the cumulative occurrence of archaeological events, such as the slope of the plot directly reflects the pace of change.
- Activity plot
An activity plot displays the first derivative of the tempo plot.
References
Bellanger, L. & Husi, P. (2012). Statistical Tool for Dating and Interpreting Archaeological Contexts Using Pottery. Journal of Archaeological Science, 39(4), 777-790. doi:10.1016/j.jas.2011.06.031 .
Dye, T. S. (2016). Long-Term Rhythms in the Development of Hawaiian Social Stratification. Journal of Archaeological Science, 71, 1-9. doi:10.1016/j.jas.2016.05.006 .
Philippe, A. & Vibet, M.-A. (2017). Analysis of Archaeological Phases Using the R Package ArchaeoPhases. Journal of Statistical Software, Code Snippets, 93(1), 1-25. doi:10.18637/jss.v093.c01 .
See also
Other plotting methods:
plot_aoristic
,
plot_fit
,
plot_mcd
,
plot_time()
Examples
if (FALSE) {
utils::vignette("event")
}